There is a 3.5mm jack in the back of the computer so you could put it on your desk or something. It's hard to tell from the question whether or not you want it to be mounted internally. If so, you could take out one of the PCI placeholder things, run the AUX Cord through the hold you just created, and plug it into the audio out port. On the inside of the case, you could probably manage to mount it somewhere. That's the best answer I have, you could also probably manage to splice a larger speaker into the existing cableAs the title says, is there a way to do it?? i have a powermac G4 MDD and the incorporated speaker is quite good, but i want a little more of power using a little aux speaker i have along with it.